Microscopic and macroscopic analysis of granular material behaviour in 3D flat-bottomed hopper by the discrete element method

• Autorzy: Balevicius R. , Kacianauskas R. R. , Mróz Z. , Sielamowicz I.
• Języki publikacji: EN

Abstrakty

EN

The paper presents the application of the discrete element method to modelling of granular material filling and discharge in 3D flat-bottomed hopper. A mathematical model, as well as the developed software code, operates with spherical visco-elastic non-cohesive frictional particles. The evolution of granular flow, internal forces and densification (rarefaction) are characterized by macroscopic parameters such as the discharge rates, the porosity fields and the wall pressures, as well as by microscopic evaluations in terms of coordination number, velocity patterns and inter-particle contact forces. It was shown that qualitative characterization of flow may be done even by relatively rough models with small number of particles, which required to be increased, however, for more precise description of the localized phenomena. Unsatisfactory evaluation of the stress peak during discharge is presented as an illustrative example. The main focus of the paper is the analysis of particle friction effect and the consistency of micro and macro-phenomena in the time-dependent flow process.

Słowa kluczowe

EN

discrete element method; spherical particles; visco-elastic granular material; three-dimensional flat bottomed hopper

PL

metoda elementów dyskretnych; cząsteczki kuliste; ziarnisty materiał lepko-sprężysty; trójwymiarowa płyta z lejem

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Archives of Mechanics
• Rocznik: 2007
• Tom: Vol. 59, nr 3
• Strony: 231--257
• Opis fizyczny: Bibliogr. 47 poz.

Twórcy

autor

Balevicius R.

autor

Kacianauskas R. R.

autor

Mróz Z.

autor

Sielamowicz I.

• Dept. of Reinforced Concrete and Masonry Structures Vilnius Gediminas Technical University Sauletekio al 11, Vilnius, Lithuania

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